title: Preparation of sustainable photocatalytic materials through the valorization of industrial wastes.
abstract: A new value-added material was developed from wastes to aim for appropriate waste management and sustainable development. This paper reports the valorization of industrial sandblasting operation wastes (SOWs) as new photocatalytic materials. This waste is composed of Fe2 O3 (60.7 %), SiO2 (29.1 %), and Al2 O3 (3.9 %) as the main components. The high presence of iron oxides was used to develop photocatalytic properties through their thermal transformation into α-Fe2 O3 . The new product, SOW-T, exhibited a good behavior towards the photochemical degradation of organic dyes. The preparation of advanced photocatalytic materials that exhibit self-cleaning and depolluting properties was possible by the inclusion of SOW-T and TiO2 in a cement-based mortar. The synergy observed between both materials enhanced their photocatalytic action. To the best of our knowledge, this is the first report that describes the use of transformed wastes based on iron oxide for the photochemical oxidation of NOx gases.
authors.affiliation: Departamento de Química Inorgánica e Ingeniería Química, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, 14071-Córdoba (Spain), Fax: (+34) 957-218621.
authors.forename: Rafael
authors.initials: R
authors.lastname: Sugrañez
authors.forename: Manuel
authors.initials: M
authors.lastname: Cruz-Yusta
authors.forename: Isabel
authors.initials: I
authors.lastname: Mármol
authors.forename: Julián
authors.initials: J
authors.lastname: Morales
authors.forename: Luis
authors.initials: L
authors.lastname: Sánchez
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry; D019245:Compressive Strength; D003247:Conservation of Natural Resources; D005290:Ferric Compounds / Q000737:chemistry*; D007220:Industrial Waste; D008751:Methylene Blue / Q000737:chemistry; D009589:Nitrogen Oxides / Q000737:chemistry; D055668:Photochemical Processes; D012822:Silicon Dioxide / Q000737:chemistry; D018505:Waste Management / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D005290:Ferric Compounds; D007220:Industrial Waste; D009589:Nitrogen Oxides; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D012822:Silicon Dioxide; D000537:Aluminum Oxide; D008751:Methylene Blue
keywords: dyes/pigments; environmental chemistry; iron; photochemistry; waste prevention